How are reactivity patterns on the periodic table related to an element's use in everyday applications?

Chemistry

1 answer:

Anuta_ua [19.1K]3 years ago

7 0

Answer:

The location of electrons in an atom can be described as concentric shells around the nucleus of the atom. The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells.

Explanation:

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Which statement correctly describes the relationship between air temperature and air pressure?

grigory [225]

Answer:

-Warm air sinks, creating an area of low pressure.

Explanation:

Heat will weigh more, than cool air!

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A smoke sample contains dust particles and several different gases, which have different combinations of molecules. the dust par

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How many moles are there in 78.3g of CO2?

oksano4ka [1.4K]

The molar mass of CO2 can be calculated as follows;
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3 years ago

PLEASE HELP! What type of rock is pumice? Describe how a pumice rock is likely to change over a long period of time.

Svetlanka [38]

Answer:

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Which substance would evaporate the fastest at room temperature? (Assume each substance has approximately the same molecular

lutik1710 [3]

Answer:

A non-polar liquid.

Explanation:

Whether a substance dissolves quickly or not depends on how strongly the molecules (or atoms of an element) of a substance are attracted to one another. These interactions between atoms and/or molecules are called intermolecular forces, or IMFs for short. There are several different ones, and these are distinguished from <em>intra</em>molecular forces which are the bonds holding atoms in the molecule together. Attached is a nice little summary of these forces to consider. Our decision lies within the fact that we must pick the substance that experiences the strongest IMF (the one with the most energy). As it turns out, a dipole in a molecule confers some charge distribution on the molecule which makes slightly positive and negative ends. These can attract each other, and it's called dipole-dipole interactions. It can technically happen in a mixture, but let's assume we're dealing with pure substances. Dipoles can only form in polar compounds however, so a non-polar liquid (which is composed of non-polar molecules), will lack these dipoles and therefore cannot form dipole-dipole interactions between the molecules. This results in only having something called dispersion forces (which really every molecule attraction has - so this is the only one). It is very weak, and since the attraction between these molecules is weak, they will tend to come apart, and evaporate. You can think of the IMFs like glue, and a weak glue will not hold the molecules together well, and they will evaporate away.

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Water can H-bond, which is why it takes so long to dry and for it to evaporate in general. Nail polish, which is really a solution of acetone, has considerably weaker dipole-dipole bonds (compared to H-bonds), and evaporates quicker than water. Hope this helps!

Note: Figure taken from Chemistry: The Molecular Nature of Matter and Change 8th edition.

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2 years ago